Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Jun. 30, 2012
Current assets:
Cash	$ 12,835	$ 17,502
Short-term investments	7,627	6,282
Accounts receivable (less allowance for doubtful accounts of $729 and $965, respectively)	35,296	42,167
Inventories	66,783	69,895
Current deferred income tax asset	5,784	7,620
Prepaid expenses and other current assets	6,369	7,764
Total current assets	134,694	151,230
Property, plant and equipment, net	52,829	53,597
Taxes receivable	3,711	3,814
Deferred tax asset, net	30,432	29,842
Intangible assets, net	8,498	8,755
Goodwill	3,034	3,034
Other assets	2,269	1,894
Total assets	235,467	252,166
Current liabilities:
Notes payable and current maturities	1,595	1,800
Accounts payable and accrued expenses	13,984	20,912
Accrued compensation	4,928	7,299
Total current liabilities	20,507	30,011
Deferred tax liabilities	2,691	2,530
Other tax obligations	10,209	10,590
Long-term debt	25,431	29,387
Postretirement benefit and pension obligations	52,187	51,810
Total liabilities	111,025	124,328
Stockholders' equity:
Additional paid-in capital	52,386	51,941
Retained earnings	91,261	94,661
Accumulated other comprehensive loss	(26,011)	(25,534)
Total stockholders' equity	124,442	127,838
Total liabilities and stockholders’ equity	235,467	252,166
Common Class A [Member]
Stockholders' equity:
Common Stock	6,064	6,017
Common Class B [Member]
Stockholders' equity:
Common Stock	$ 742	$ 753